249323 has 4 divisors (see below), whose sum is σ = 250488. Its totient is φ = 248160.

The previous prime is 249317. The next prime is 249329. The reversal of 249323 is 323942.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 323942 = 2 ⋅161971.

It is an interprime number because it is at equal distance from previous prime (249317) and next prime (249329).

It is a cyclic number.

It is not a de Polignac number, because 249323 - 2¹⁰ = 248299 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁷ + 4² + 3¹⁰ + 9 + 2¹⁷ + 3¹⁰ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158 + ... + 723.

It is an arithmetic number, because the mean of its divisors is an integer number (62622).

2²⁴⁹³²³ is an apocalyptic number.

249323 is a deficient number, since it is larger than the sum of its proper divisors (1165).

249323 is an equidigital number, since it uses as much as digits as its factorization.

249323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164.

The product of its digits is 1296, while the sum is 23.

The square root of 249323 is about 499.3225410494. The cubic root of 249323 is about 62.9391366510.

The spelling of 249323 in words is "two hundred forty-nine thousand, three hundred twenty-three".